"Fin off" is a phrase used to describe the act of completing or finishing something. There are various synonyms for this term that convey the same meaning. For instance, "wrap up" is a commonly used synonym which suggests bringing an activity or task to a close. Another synonym is "conclude", which implies reaching the end or finalizing a given matter. Additionally, the phrase "bring to an end" can be utilized as a synonym to indicate the act of finishing a particular undertaking or event. Similarly, the phrases "complete", "finish", and "accomplish" all convey the notion of reaching the end or goal of a certain activity.